Knex Programmable Rod V2

This is a smaller version of my Programmable rod.

You program it by changing the pins on the chain. Every time a pin passes a point, the direction of the output rod changes.

The chain design was inspired by TheFoofinator. Check out his programmable vihicle!

Here is a video of the machine in action:

There are 6 silver spacers on the red rods.

These yellow gears will slide onto the red rods.

The big gear on the output rod should mesh with the bottom gear from the previous step.

All of these pieces fit on the grey rod. These pieces are:

• Tan clip (on tip)
• Blue spacer
• White connector
• 2 Silver spacers
• White connector
• Blue spacer
• Tan clip
• Yellow gear
• Blue spacer
• White connector
• Silver spacer
• 2 Blue spacers
• White connector
• Silver spacer
• 2 blue spacers
• Tan clip
• 2 Red Gears
• Tan clip
• 2 blue spacers
• Silver spacer
• White connector
• Silver spacer
• Blue spacer
• Tan clip (on tip)

This part controls the director of the output rod.

This is the combination of a crankshaft, and a very unusual gear with two teeth.

The Y-clips will clip onto the red rods. Once you're finished building, you will have to slide the Detector up and down the red rods to find the best position for it to be in.

This rod will hold the motor and the chain.

This holds the gears in position.

Every time an orange connector passes the detector, the output rod changes direction.

Connect the orange connectors to the chain using a Y-clip.

In the example I gave, 25 chain links are needed.

You still need to add a motor and move the detector.

I find that the gears slip quite frequently. If anyone knows a solution please tell me.